John g



(No Model.)

J. G. DONNENWER'I'H.

MEANS POR OIEING OYLINDERS OE STEAM ENGINES. No.. 288,037. n Patented Nov. 6, 1883.

INVENTOR AT'IORNEYS.

WITNESSES UNITED STATES PATENT OFFICE.

JOHN G. DONNENWERTH, 0F BROVNING, MISSOUVRI.

MEANS FR OILING CYLINDERS OF STEAM-ENGINES.

SPECIFICATION forming part of Letters PatentNo. 288,037, dated November 6, 1883.

Application filed April 3, 1883. (No modeh To all whom tmc/y con/cern: 4

Be itlrnown that l, JOHN G. DoNNENwEETn, of Browning, in the county of Linn and State of Missouri, have invented a new and Improved Means for Oiling Cylinders of Steam- Engines, of which the following is a full, clear, and exact description.

With the means usually employed for oiling cylinders' of steam-engines there is agreat waste of oil on account of its being carried off by the steam, so that the cylinder is either` imperfectly lubricated, or else an unnecessary amount of oil is used for the purpose.

The object of my invention is to obviate these difficulties; and it consists in the device hereinafter described and claimed.y

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

. Figure l is a longitudinal section of a steamcylinder and piston with my improvements.

Fig. 2 is across-section on line a: as, Fig. 1.

Fig. 3 is an enlarged detail section ofthe pistion. Fig. 4c is a cross-section on the line y y,

ig. l.

The piston-head A in the cylinder B is attached upon the end of apiston-rod, C, that is formed hollow for a considerable distance next to the piston-head. lThe head A is formed with an oil-cavity, a, communicating with the interior ofthe hollow rod C by an opening, b, and there are also radial passages c, extending from the cavity a, -and terminating beneath the packing-rings of the piston-head.

d is a valve, made in the form of a plug, fitting through the piston-head into the outer end of the rod C, and having a movement limited by a screw, e, that is held in a bridge, f, so thatthescrew serves to prevent the valve from being forced out. The inner end of the plug-valve eZ is made hollow, andis also formed with a side opening, i, (shown most clearly in Fig. 3,) which registers with the opening b f into the oil-cavity a when the valve is moved 4outward.

Z Z are steam-passages extending from the face of the piston-head to the interior of the rod C, and terminating in front of the :inner end of the valve d. The rod C is fitted with an oil-cup, m, for supplying oil.

In operation, as the piston is moved in one direction by steam admitted at the end of the cylinder, the steam passing in by the openings Z forces the valve d outward and causes the oil to pass from the hollow rod through the openings i Z) to the oil-cavity a, from whence it passes out radially by the radial openings c. On the return movement of the piston the valve d is forced inward, and the valve thus being givena back-and-forth movement, acts in the manner of a pump to supply the oil-cavity a, with oil. The oil is thus supplied in a manner that prevents it being carried off by the steam passing out at the exhaust. By adj ustment of the screw e to limit the movement ofthe valve the quantity of oil passing out isregulated.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is l Y l. A hollow piston, A, with radial open` ings c, oil-cavity a, steam-passages Z Z, and hollow rod C, in combination with plug-valve d, having side openings, t, and oil-/cup attached to hollow piston-rod for supplying oil to cylinder, substantially as set forth.

2. The hollow plug-valve d, provided with a side opening, z', in combination with the pis- Vton-head A, having cavity a, and openings b c Z, and the hollow piston-rod C, substantially 8o as shown and described.

3. The bridge j' and screw e, in combination with the valve cZ and piston-head A, substantially as and for the purpose specified.

JOHN GEORGE .DONXENWERTH Witnesses:

YV. T. STEPHENsoN, J. M. SHAEEER. 

